People waiting in lines did spend for admission, though. Consider it this way: If all rides and all facilities have lines waiting for entrance, they are all at

People waiting in lines did spend for admission, though. Consider it this way: If all rides and all facilities have lines waiting for entrance, they are all at maximum productive capacity. The only way to expand revenue is to get more people in the door, or build more revenue-generating attractions (only the attractions that charge per use matter here). Not 100% accurate, b/c I'm sure that not each and every little hot dog stand or tchotchke booth has a queue, but a good model.